harlot vs adult female

harlot and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
harlot	Yes	No	No	No
adult female	Yes	No	No	No

As nouns, adult female is a hypernym of harlot; that is, adult female is a word with a broader meaning than harlot:

Other hypernyms of harlot include woman.

harlot (noun)	adult female (noun)
a woman who engages in sexual intercourse for money	an adult female person (as opposed to a man)